Anderson ANM77 Manuel d'utilisation - Page 11

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combustion air blower filter if applicable.

13.2

Yearly checklist

–

Leak test the safety shut-off valves and gas train for tightness of closure to make

sure no leakage.

–

Test the pressure switch settings by checking the switch movements against

pressure settings and comparing these with the actual pressure.

–

Visually check igniter cable and connectors.

–

Be sure the burner bodies and air wings, the ignitor and the flame sensors are not

damaged or distorted.

14. Troubleshooting Procedures

Several reasons can cause burner failure, below a few frequent or typical common

component failures are listed that can cause burner trip.

Failure source

High gas pressure

Low gas pressure

High gas pressure at burner inlet

Gas control valve not in start

position

Process flow or combustion air flow

too low

Pilot/cooling air pressure too low

Pilot flame does not light

Main flame does not light

Pilot flame failure after ignition

Failure during operation

Anderson Thermal Soluions（Suzhou）Co. Ltd.

Anderson Thermal Solutions – ANM77 Burner Operation Manual

Possible causes:

Defective gas pressure regulator

Incorrectly adjusted gas pressure regulator

or shortage of gas supply

Limit switch or end switch not setup inside control valve

(flame length becomes excessive)

Electric or pneumatic signal for opening the control valve

fails. Control from DCS

The inlet of the air pressure switch is blocked or the port

connecting the three-way valve to the fan is blocked

Blower inlet blocked

Air pressure regulator malfunction, if used

Ignition transformer defect

Spark plug defect

Pilot gas, solenoid or the shut-off valve defect allowance

Pilot trial for ignition time is too short

Amount of start gas flow is too low

Main gas valve defective

Pilot trial for ignition time too short

Pilot flame is unstable and requires re-adjusting

UV tube defective

Shortage of combustion air

Shortage of process air

Shortage of gas supply

Customer other interlocks